Carman scanFor EMS PROfesor
Checkpoint for current and primary ignition wave.
1)Distributor Less Ignition type
< Measuring part >
Measure flowing time and the current at
checkpoint 1,2
<Checkpoint>
Resistance
of
wire,
status
of
components (checking components 1:
internal ECU or external TR)
2) Distributor Ignition type
<Measuring part>
Measure flowing time and the current at
checkpoint 1,2
<Checkpoint>
Resistance of wire or a short, status of
components (checking components 1:
internal ECU or External TR, checking
components 2: ignition coil)
Most important point is dwell time(depends on battery voltage). If battery voltage is 13.5V the dwell time
is 3.0~3.5msec. Cylinder by cylinder deviation(over 20%) check is required to know the normal or not. If
the deviation is more than 20%, it means coil, power TR or wire has a problem..
Also check the ECU recognized battery voltage is stable(within 3V). Because the dwell time can be
some difference depends on battery voltage.
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